A class of pollutants formed at high temperatures (nearly complete combustion) in the presence of air is
a. sulfur oxides.
b. carbon oxides.
c. iron oxides.
d. nitrogen oxides.
d
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The most important property of elastomers is the high elastic _________.
Fill in the blank(s) with the appropriate word(s).
A machinist with normal vision has a near point at 25 cm. The machinist wears eyeglasses in order to do close work. The power of the lenses is +4.25 diopters. With these eyeglasses, the near point of the machinist, in cm, is closest to:
A) 12 B) 10 C) 7 D) 15 E) 17
A point charge is located at the origin. Centered along the x axis is a cylindrical closed surface of radius 10 cm with one end surface located at x = 2 m and the other end surface located at x = 4 m. If the magnitude of the electric flux through the surface at x = 2 m is 4 N ? m2/C, what is the magnitude of the electric flux through the surface at x = 4 m?
a. 1 N ? m2/C b. 2 N ? m2/C c. 4 N ? m2/C d. 16 N ? m2/C e. The correct value is not given.
The most common depositional shoreline feature is a
A) beach. B) wave-cut platform. C) barrier island. D) seamount.